Default cluster configuration allows users to have read and execute rights of the other users home directories. Of course, a user can change this setting by using the proper command
chmod, some examples of which follow:
chmod 700 /home/user1
The above command gives full access rights (read, write, execute) only to the owner of the folder (user1). All other users have no access to this folder. By the following command the other users have read and execute rights of the folder user1
chmod 750 /home/user1
For cases, where a user should share data between specific users, hpc admins should be contacted.